Climate averages 1991–2020
Germantown weather
in January.
A cold, moderately wet month: the coolest and the 3rd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a cold month in Germantown: daytime highs average 4.7°C and nights cool to about -3.1°C. By daytime temperature it is the coolest month of the year.
Expect about 78 mm of rain on roughly 9 days, which makes January a moderately wet month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 9 h 45 min on an average January day.
The nearest other city in this atlas is Silver Spring (29 km away). In January its highs average 5.2°C, 0.5°C warmer than Germantown, with 78 mm of rain.
Among the 498 cities listed in the United States, Germantown ranks joint 322nd of 498 for the warmest January highs and joint 259th of 498 for the driest January (rainfall, lowest first). The mean January high of those 498 cities is 9.5°C; Germantown is 4.8°C cooler than that mean.
From January to February, average highs rise by 1.9°C to 6.6°C, and monthly rainfall falls from 78 mm to 71 mm.
The annual picture
January in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Germantown climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | 4.7°C-3.1°C | -3.1°C | 78 | 8.6 | 9.810 h |
| February | 6.6°C-2.5°C | -2.5°C | 71 | 8.4 | 10.711 h |
| March | 11.2°C1.2°C | 1.2°C | 97 | 10.2 | 11.912 h |
| April | 17.7°C6.8°C | 6.8°C | 87 | 10.4 | 13.213 h |
| May | 22.6°C12.5°C | 12.5°C | 97 | 11.5 | 14.314 h |
| June | 27.6°C17.6°C | 17.6°C | 90 | 10.8 | 14.915 h |
| July | 30.1°C20.4°C | 20.4°C | 102 | 11.2 | 14.615 h |
| August | 29.0°C19.6°C | 19.6°C | 85 | 10.4 | 13.714 h |
| September | 25.1°C16.0°C | 16.0°C | 113 | 9.3 | 12.512 h |
| October | 18.6°C9.7°C | 9.7°C | 87 | 7.8 | 11.211 h |
| November | 12.1°C3.9°C | 3.9°C | 76 | 7.7 | 10.110 h |
| December | 6.8°C-0.6°C | -0.6°C | 89 | 8.8 | 9.59 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
January in nearby cities
- Silver Spring in JanuaryUnited States · 29 kmHigh 5.2°C · Low -2.6°C · 78 mm rain
- Arlington (Virginia), United States in JanuaryUnited States · 36 kmHigh 5.5°C · Low -2.6°C · 78 mm rain
- Washington in JanuaryUnited States · 37 kmHigh 6.0°C · Low -2.3°C · 78 mm rain
- Columbia (Maryland), United States in JanuaryUnited States · 38 kmHigh 4.6°C · Low -2.7°C · 80 mm rain
- Centreville in JanuaryUnited States · 39 kmHigh 5.4°C · Low -2.2°C · 77 mm rain
- Alexandria, United States in JanuaryUnited States · 45 kmHigh 6.1°C · Low -1.9°C · 77 mm rain
- Baltimore in JanuaryUnited States · 58 kmHigh 4.8°C · Low -2.9°C · 90 mm rain
- Wilmington (Delaware), United States in JanuaryUnited States · 161 kmHigh 4.5°C · Low -3.0°C · 82 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Germantown) is explained once on the Germantown year overview and on the Sources, method and limits page.